As an important part of market information, accounting information reveals the timeliness, which plays an extremely important role to the market supervisors and investors. This research took 852 annual financial reports, published by Chinese Growth Enterprise Market(GEM) listing corporations from 2012-2014, as the samples to do empirical research on the board structure’s influences on the accounting information disclosure. The results showed that the board structure had influences on the timeliness of accounting information disclosure in a certain extent, CEO duality in listing corporation had negative correlation with the timeliness of accounting information disclosure, and the proportion of independent directors had positive correlation with it.